322145321 has 2 divisors, whose sum is σ = 322145322. Its totient is φ = 322145320.

The previous prime is 322145309. The next prime is 322145357. The reversal of 322145321 is 123541223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164994025 + 157151296 = 12845^2 + 12536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-322145321 is a prime.

It is not a weakly prime, because it can be changed into another prime (322145381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161072660 + 161072661.

It is an arithmetic number, because the mean of its divisors is an integer number (161072661).

Almost surely, 2^322145321 is an apocalyptic number.

It is an amenable number.

322145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

322145321 is an equidigital number, since it uses as much as digits as its factorization.

322145321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 322145321 is about 17948.4071995261. The cubic root of 322145321 is about 685.5154952506.

Adding to 322145321 its reverse (123541223), we get a palindrome (445686544).

The spelling of 322145321 in words is "three hundred twenty-two million, one hundred forty-five thousand, three hundred twenty-one".